rb25 boost increase?

[illdrift]

A question about the boost tap i have, i havent really pulled others apart to inspect them, my ones the only one ive seen. Inside it, it has a ball bearing sealing off the hose from the manifold, and a spring pushing the ball bearing to shut it off. You turn the knob to compress the spring pushing against the ball bearing. Before getting this boost tap, i thought the conventional idea was its just a piece of metal with a hole in it and turning the knob enlarged the hole bleeding off more air(which i thought meant air escaping from the hose). Now what ive read about electronic boost controllers is that they don't spike and they dont open up the wastegate until they hit the desired psi, and this helps reduce lag. But with the design like my tap, air is not blead off, once the psi is reached, there is enough pressure against the ball-bearing to compress the spring and then go to the wastegate. This would mean no spiking, and reduced lag, in other words exactly the same as the electronic controller cept for being electronic. So question is, is my understanding correct? or can someone please correct me.

Cheers
Modified by illdrift at 2:38 PM 5/11/2006